Reports intensify that up to 12,000 North Korean troops are training in Russia in preparation to fight alongside Moscow.

Pyongyang branded Seoul the "principal enemy" earlier this year, abandoning decades of efforts toward reunification of the peninsula.

Poland's president, Andrzej Duda, arrived at South Korea's Presidential Office on Thursday for a summit with President Yoon Suk Yeol.

The deployment raises the potential for the North Koreans to join Russian forces in Ukraine and suggests expanded military ties between the two nations as Moscow seeks weapons and troops.

Local media report that ballon also carried leaflets ridiculing the South Korean president.

South Korea says trash carried by a North Korean balloon has fallen on the presidential compound in central Seoul

Lindsey Reiser reports on how presidential candidates are trying to connect with voters ahead of Election Day, mounting evidence of a possible military alliance between Russia and North Korea, and the devastating impact of coral bleaching on marine life.

South Korea says trash carried by a North Korean balloon has fallen on the presidential compound in Seoul

South Korea says trash carried by a North Korean balloon has fallen on the presidential compound in central Seoul.

Secretary of Defense Lloyd Austin confirmed Wednesday there is evidence that North Korea has sent troops to Russia. CBS News senior national security correspondent Charlie D'Agata has more.

North Korea sent at least 3,000 troops to Russia in mid-October, the White House said Wednesday. This comes after Ukrainian President Volodymyr Zelenskyy said last week that Ukraine had intelligence that North Korean soldiers were being prepared to fight in Ukraine. Margaret Brennan has the latest.

The Biden administration said that at least 3,000 North Korean troops are training in Russia, though it remains unclear if theyll join the war.

Defense Secretary Lloyd Austin says North Korea has sent troops to Russia. The U.S. is now trying to determine whether the North Koreans will be heading on to Ukraine to take part in the war there.

Biden administration officials are still weighing a response as Moscow becomes more reliant on foreign assistance to reinforce its military offensive in eastern Ukraine.

What You Need to Know: North Korea has reportedly deployed up to 3,000 troops to support Russia's invasion of Ukraine, with more expected to follow.-U.S. Secretary of Defense Lloyd Austin confirmed that North Korean soldiers are already on the frontlines, suggesting Russia's manpower shortages persist. North Koreas aid marks a deepening of the alliance, but experts c...

Harris makes final pitch to voters with 13 days left in campaign; John Kirby says White House monitoring North Korean troops in Russia.

North Koreas dispatch of 1,500 special forces to Russia, as the vanguard of an estimated 12,000 troopsto join Moscows invasion of Ukraine, marks a significant evolution of Pyongyangs evolvi...

White House national security spokesman John Kirby warned that I can tell you one thing, though, if they do deploy to fight against Ukraine, theyre fair game.